#define _CRT_SECURE_NO_WARNINGS 1
#include "Heap.h"
void HPInit(HP* php)
{
	assert(php);

	php->a = NULL;
	php->size = php->capacity = 0;
}
void HPDestory(HP* php)
{
	assert(php);

	free(php->a);
	php->a = NULL;
	php->size = php->capacity = 0;
}
void swap(HPDataType* p1, HPDataType* p2)
{
	HPDataType tmp = *p1;
	*p1 = *p2;
	*p2 = tmp;
}
void AdJustUp(HPDataType* a,int child)
{
	int parent = (child - 1) / 2;
	while (child > 0)
	{
		if (a[child] > a[parent])
		{
			swap(&a[child], &a[parent]);
			child = parent;
			parent = (child - 1) / 2;
		}
		else
		{
			break;
		}
	}
}
void HPPush(HP* php, HPDataType x)
{
	assert(php);

	if (php->size ==php->capacity)
	{
		int newcapacity = php->capacity == 0 ? 4 : 2 * php->capacity;
		HPDataType* tmp = (HPDataType*)realloc(php->a,sizeof(HPDataType)*newcapacity);

		php->capacity = newcapacity;
		php->a = tmp;
	}
	php->a[php->size] = x;
	php->size++;

	AdJustUp(php->a, php->size - 1);

}
void AdJustDown(HPDataType* a, int n, int parent)
{
	int child = 2 * parent + 1;
	while (child < n)
	{
		if (child+1<n&&a[child+1] > a[child ])
		{
			child++;
		}
		if (a[child] > a[parent])
		{
			swap(&a[child], &a[parent]);
			parent = child;
			child = 2 * parent + 1;
		}
		else
		{
			break;
		}
	}
}
void HPPop(HP* php)
{
	assert(php);
	assert(php->size > 0);

	swap(&php->a[0], &php->a[php->size - 1]);
	php->size--;

	AdJustDown(php->a, php->size - 1, 0);
}

HPDataType HPTop(HP* php)
{
	assert(php);

	return php->a[0];
}

bool HPEmpty(HP* php)
{
	assert(php);

	return php->size == 0;
}